<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>注释</title>
</head>
<body>
    <script>
        // 单行注释
        /*
            注释内容
            块级注释
        */
        alert("Hello JS");
    </script>
</body>
</html>
